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% Document Info
\author{Cash (CashM)}
\pdfinfo{
  /Title (python-naming-conventions.pdf)
  /Creator (Cheatography)
  /Author (Cash (CashM))
  /Subject (Python Naming Conventions Cheat Sheet)
}

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\noindent
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    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
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    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Python Naming Conventions Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Cash (CashM)} via \textcolor{DarkBackground}{\uline{cheatography.com/123081/cs/48397/}}}
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  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}Cash (CashM) \\
  \uline{cheatography.com/cashm} \\
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  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 31st August, 2026.\\
   Updated 31st August, 2026.\\
   Page {\thepage} of \pageref{LastPage}.
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  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
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\begin{document}
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% www.emerson.emory.edu/services/latex/latex_169.html
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\begin{tabularx}{17.67cm}{X}
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\mymulticolumn{1}{x{17.67cm}}{\bf\textcolor{white}{Reference}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{17.67cm}}{{\bf{Python Class (10-152-117)}}   \newline % Row Count 1 (+ 1)
{\bf{Reference:}} {[}PEP 8 - Style Guide for Python Code{]}(https://peps.python.org/pep-0008/)% Row Count 3 (+ 2)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
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\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{5.7358 cm} x{6.5793 cm} x{4.5549 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{17.67cm}}{\bf\textcolor{white}{The Python Quick Rule}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Use in Python}} & {\bf{Preferred Convention}} & {\bf{Example}} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
Variables & snake\_case & \seqsplit{total\_cost} \tn 
% Row Count 3 (+ 1)
% Row 2
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Functions and methods & snake\_case & \seqsplit{calculate\_total()} \tn 
% Row Count 5 (+ 2)
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Modules and packages & {\bf{short}} snake\_case & \seqsplit{grade\_tools}.py \tn 
% Row Count 7 (+ 2)
% Row 4
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Classes & PascalCase & \seqsplit{GradeCalculator} \tn 
% Row Count 9 (+ 2)
% Row 5
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Exceptions & PascalCase & \seqsplit{InvalidGradeError} \tn 
% Row Count 11 (+ 2)
% Row 6
\SetRowColor{LightBackground}
Constants & \seqsplit{UPPER\_SNAKE\_CASE} & \seqsplit{MAX\_ATTEMPTS} = 3 \tn 
% Row Count 13 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
\SetRowColor{LightBackground}
\mymulticolumn{3}{x{17.67cm}}{Use snake\_case for most names, PascalCase for classes, and UPPER\_SNAKE\_CASE for \newline constants. Names should describe the value, behavior, or responsibility they represent.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}---}
\end{tabularx}
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\SetRowColor{DarkBackground}
\mymulticolumn{4}{x{17.67cm}}{\bf\textcolor{white}{Common naming conventions}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Convention}} & {\bf{Example}} & {\bf{Where you may see it}} & {\bf{Python status}} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
lowercase & score & Simple names & Common \tn 
% Row Count 5 (+ 2)
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snake\_case & \seqsplit{student\_score} & Python variables, functions, methods, modules & {\emph{PEP 8 preferred}} \tn 
% Row Count 9 (+ 4)
% Row 3
\SetRowColor{white}
PascalCase \seqsplit{(CapitalCase)} & \seqsplit{StudentScore} & Classes and exceptions & {\emph{PEP 8 preferred}} \tn 
% Row Count 12 (+ 3)
% Row 4
\SetRowColor{LightBackground}
camelCase & \seqsplit{studentScore} & JavaScript, Java, C\# & Avoid for Python names \tn 
% Row Count 15 (+ 3)
% Row 5
\SetRowColor{white}
\seqsplit{UPPER\_SNAKE\_CASE} \seqsplit{(SCREAMING\_SNAKE\_CASE)} & \seqsplit{MAX\_SCORE} & Constants and \seqsplit{configuration} & {\emph{PEP 8 preferred}} \tn 
% Row Count 19 (+ 4)
% Row 6
\SetRowColor{LightBackground}
kebab-case \seqsplit{(train-case)} & \seqsplit{student-score} & URLs, CSS classes, command-line options & Not valid for Python \seqsplit{identifiers} \tn 
% Row Count 23 (+ 4)
% Row 7
\SetRowColor{white}
dot.case & \seqsplit{student}.score & Module paths and attribute access & Not a single \seqsplit{identifier} \tn 
% Row Count 27 (+ 4)
% Row 8
\SetRowColor{LightBackground}
Title Case & \seqsplit{Student} Score & Headings and human-facing labels & Not a Python \seqsplit{identifier} \tn 
% Row Count 31 (+ 4)
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{5.1057 cm} x{1.647 cm} x{5.4351 cm} x{4.2822 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{4}{x{17.67cm}}{\bf\textcolor{white}{Common naming conventions (cont)}}  \tn
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flatcase & \seqsplit{studentscore} & Occasional file names or labels & Rare; less readable \tn 
% Row Count 3 (+ 3)
% Row 10
\SetRowColor{white}
UPPERCASE & \seqsplit{MAXSCORE} & Acronyms or legacy systems & Rare; avoid for new Python names \tn 
% Row Count 7 (+ 4)
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\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{17.67cm}}{\bf\textcolor{white}{Python-specific underscore conventions}}  \tn
% Row 0
\SetRowColor{LightBackground}
Pattern & \seqsplit{Example} & Meaning \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Leading underscore & \seqsplit{\_cached\_result} & Conventionally internal or non-public. from module import * does not import it. \tn 
% Row Count 6 (+ 5)
% Row 2
\SetRowColor{LightBackground}
Trailing underscore & class\_ & Avoids a conflict with a Python keyword or built-in name. \tn 
% Row Count 10 (+ 4)
% Row 3
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Double leading underscore & \seqsplit{\_\_balance} & Python applies name mangling inside a class to help avoid accidental subclass conflicts. \tn 
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% Row 4
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Double leading and trailing underscores (dunder) & \seqsplit{\_\_init\_\_}, \seqsplit{\_\_len\_\_} & Special names defined by Python. Do not invent new dunder names. \tn 
% Row Count 20 (+ 4)
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\begin{tabularx}{17.67cm}{X}
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\mymulticolumn{1}{x{17.67cm}}{\bf\textcolor{white}{Identifier rules}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{17.67cm}}{• Start with a letter or underscore, followed by letters, digits, or underscores. \newline % Row Count 2 (+ 2)
• Do not start with a digit: 2nd\_attempt is invalid. \newline % Row Count 4 (+ 2)
• Do not use spaces or hyphens: student score and student-score are invalid. \newline % Row Count 6 (+ 2)
• Python is case-sensitive: score, Score, and SCORE are different names. \newline % Row Count 8 (+ 2)
• Do not reuse Python keywords such as class, for, if, or return. \newline % Row Count 10 (+ 2)
• Prefer descriptive names: average\_score is clearer than avg when space allows.% Row Count 12 (+ 2)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
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\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{X}
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\mymulticolumn{1}{x{17.67cm}}{\bf\textcolor{white}{PEP 8 reminders}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{17.67cm}}{• Choose names that reveal intent: is\_complete is clearer than flag. \newline % Row Count 2 (+ 2)
• Use verbs for actions: save\_file(), calculate\_total(), and display\_menu(). \newline % Row Count 4 (+ 2)
• Use nouns for values and objects: student\_name, shopping\_cart, and report. \newline % Row Count 6 (+ 2)
• Use boolean names that read like questions: is\_valid, has\_access, and can\_submit. \newline % Row Count 8 (+ 2)
• Be consistent. A project using student\_name should not also use studentName.% Row Count 10 (+ 2)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}



\end{document}